The tables below provide brief details of UK Government valves issued before the introduction of the CV Register in 1941. The nearest commercial equivalent is provided for most of them, although, the commercial types were often modified, including change of base. Most of the valves were later given CV numbers and these have also been included in the tables.
UK Government Valves |
Type | Commercial Equivalents | Filament | Description & Comments | Base |
| | Volts | Amps | | Type | Ref |
|
Note: for Loctal B8G read B8B, USS & USM = UX, Y8A = Footless |
V.A.1 | P.O. and BTH | 3.8* | 0.85 | Repeater triode (1918) | PO-1 | - |
V.A.2 | B, possibly BTH | | | Repeater triode (1918) | PO-1 | - |
POVT3 | R (GEC),
R5V (MOV) | 4.0*
5.0* | 0.65
0.70 | Triode | B4 | 1 |
POVT4 | R (GEC) | 4.0* | 0.65 | Triode (1919) | PO-2 | - |
POVT5 | Unknown (MOV) | | | Triode (1919) | | |
POVT6 | L.S.2 (MOV) | 6.0* | 1.50 | Output triode (1919) | B4 | 1 |
POVT7 | Unknown | | | (1920) | PO-2 | - |
POVT8 | 208-A (W-E) | | | (1921) | UV | - |
POVT9 | 209-A (W-E) | | | (1921) | UV | - |
| MT4 (MWT) | 12.5* | 6.30 | Transmitting triode, 1.5MHz, 200W rating | None | - |
| MR4 (MWT), Special (Edi) | 12.5* | 6.30 | Half-wave rectifier, 15kV PIV | None | - |
POVT12 | Unknown (MOV)) | | | Triode (1921) | - | - |
|
POVT13 | Unknown (Mul) | | | Triode (1921) | - | - |
POVT14 | Unknown (MOV) | | | Triode (1921) | PO-2 | - |
POVT15 | AT40 modified (MWT) | 7.0* | 1.50 | Similar to AT40 but grid turns not so fine (1921) | PO-2 | - |
| OC2.5Kw (Mul) | 40.0* | 18.00 | Silica transmitting triode, 500kHz, 10kW rating (1922) | None | - |
| U.4KW modified (Mul) | 40.0* | 18.00 | Silica half-wave rectifier, 15kV p.i.v (1922). | None | - |
POVT18 | Unknown (MOV) | | | Transmitting triode (1922) | - | - |
POVT19 = CV1612 | VT9B (MWT) | † | 15.50 | Transmitting triode, 20kHz, 200W rating (1922) | None | - |
POVT20 | Unknown | | | Triode (1922) | - | - |
| Special (Ediswan) | † | 15.50 | Half-wave rectifier, 30kV PIV (1922) | None | - |
POVT22 | Unknown | | | Transmitting triode (1922) | - | - |
POVT23 = CV1023 | 230XP (Cos) | 2.0* | 0.30 | Output triode (1922) | B4 | 1 |
POVT24 = CV1636 | LS5 (MOV) | 4.5* | 0.82 | Output triode (1922) | B4 | 1 |
|
| LS5 (MOV) | 4.5* | 0.82 | Output triode (1923) | BC4 | 1 |
POVT26 = CV1600 | CAT1 (MWT), 4006A (STC) | † | 49.50 | Water-cooled transmitting triode,150kHz, 10kW rating (1923) | None | - |
| CAR1 (MWT), 4008B (STC) | † | 55.00 | Water-cooled half-wave rectifier, 45kV PIV (1923) | None | - |
POVT28 | DE3 (MOV), B5 (BTH) | 2.8* | 60mA | General-purpose triode (1923) | B4 | 1 |
POVT29 | V24 (MOV) | 5.0* | 0.75 | Low capacitance general-purpose triode (1924) | 4C | - |
POVT30 | Unknown (Philips) | | | Triode (1925) | - | - |
| 4101-D (STC), 101DW (W-E) | 4.5* | 1.00 | Repeater triode (1925) | BC4 | 1 |
| 4101-E (STC) | 4.5* | 1.00 | General-purpose triode (1925) | BC4 | 1 |
POVT32 | 4102-D (STC) | 2.1* | 1.00 | General-purpose triode (1925) | BC4 | 1 |
POVT32A | Probably 4102-D (STC) | 2.1* | 1.00 | General-purpose triode (1925) | BC4 | 1 |
| 4102-D (STC) | 2.1* | 1.00 | General-purpose triode (1925) | BC4 | 1 |
| 4102-E (STC) | 2.1* | 1.00 | General-purpose triode (1925) | BC4 | 1 |
|
| DER (MOV), Unknown (Maz) | 1.8* | 0.35 | General-purpose triode (1925) | B4 | 1 |
POVT34 = CV1614 ES1500 (Edi) | MT13 (MWT) | † | 24.00 | Transmitting triode, 22MHz, 1.5kW rating (19255) | None | - |
| ESU1500 (Edi) | † | 28.00 | Half-wave rectifier, 25kV PIV (1925) | None | - |
| CAR4 (MWT) | † | 72.50 | Water-cooled half-wave rectifier, 30kV PIV | None | - |
POVT37 | Unknown (MOV). Possibly E1522 | 2.0* | 0.82 | Triode | BC4 | 1 |
POVT37A | Unknown (MOV) | 2.0* | 0.82 | Triode | BC4 | 1 |
| E132 (MOV) | 2.0* | 0.82 | General-purpose triode | BC4 | 1 |
| E1532 (MOV) | 2.0* | 0.82 | General-purpose triode | BC4 | 1 |
| E133 (MOV) | 4.5* | 0.82 | Low-impedance triode | BC4 | 1 |
| E1453 (MOV) | 4.0* | 0.15 | Low-impedance triode | BC4 | 1 |
| | 4.5* | 0.80 | Output triode (with BC4 base) | BC4 | 1 |
| LS5B (MOV) | 4.85* | 0.85 | General-purpose triode (with BC4 base) | BC4 | 1 |
|
POVT41 | Unknown (MOV & Mul) | 5.5* | 1.80 | Power triode, 40W rating | Special | - |
POVT44 | Unknown (Maz) | | | Triode | - | - |
POVT45 | Unknown (Maz & Mul) | | | | - | - |
| Special (Ediswan) | † | 10.00 | Transmitting triode, 15MHz, 12kW rating | 3-pin+tc | - |
| 4014-A (STC) | † | 40.50 | Water-cooled transmitting triode, 15MHz, 12kW rating | None | - |
POVT49 | B.O. (Siemens Halske) | 1.8 | 1.10 | Repeater triode | 5-pin | - |
POVT50 | Unknown (STC) | | | Repeater triode | - | - |
| Special (Ediswan) | 15.5* | 10.00 | Transmitting triode, 2MHz, 300W rating | None | - |
POVT52 = (CV1025) | DET25 or DET1 (MWT), | 7.5* | 1.00 | Transmitting triode, 15MHz, 36W rating | L4 | 1 |
POVT53 = CV1604 | SS1971 (STC) | † | 62.0 | Water-cooled transmitting tetrode, 22MHz, 15kW rating | None | - |
POVT54 = CV1618 | ES250M (Ediswan) | † | 10.00 | Transmitting triode, 250W rating | 3-pin+tc | - |
POVT55 | Unknown (STC) | | | | - | - |
|
POVT56 = CV1648 | 4205-E (STC) | 4.5* | 1.60 | General-purpose triode (Bayonet adjacent to grid pin) | BC4 Special | - |
POVT57 = CV25 | 4242-A (STC) | 10.0* | 3.25 | RF or AF power amplifier triode, 6MHz, 85W rating | LB4 | 1 |
POVT58 = CV1619 | MZ2-200 (Mul), 4212-E (STC) | 14.0* | 6.00 | Transmitting triode, 21MHz, 250W rating | LB4 | 1 |
POVT59 = CV1620 | DET6 (MWT) 4094-A STC) | 10.0* | 3.00 | Transmitting triode, 6MHz, 65W rating | 4-pin | - |
POVT60 = CV1605 | 4014-C (STC) | † | 36.00 | Water-cooled transmitting triode, 22MHz, 8kW rating | None | - |
POVT61 = CV1609 | SW7 (Mul) | 29.0* | 17.00 | Silica triode, 20MHz, 2.5kW rating | None | - |
POVT62 = CV1606 | CAT2 (MWT) | † | 49.50 | Water-cooled transmitting triode, 22MHz, 10kW rating | None | - |
POVT63 | DG250 (Edi), Special (Mul) | | | Double triode, 2 x 250W rating | - | - |
POVT64 | Unknown (MOV) | | | Triode | - | - |
POVT65 = CV1649 | E133 (MOV) | 4.5* | 0.82 | Low-impedance triode | B4 | 1 |
POVT66 = CV1650 | LS5A (MOV) | 4.85* | 0.85 | Output triode | B4 | 1 |
POVT67 = (CV2846) | LS5B (MOV) | 6.0* | 0.95 | Output triode, 10W rating | B4 | 1 |
|
POVT68 = CV1651 | G445B (MOV), Special (Mul) | 4.0* | 0.45 | Repeater triode | B4 | 1 |
POVT69 = CV1652 | P220A (Maz) | 2.0* | 0.20 | Output triode, 2W rating | B4 | 1 |
POVT72 = CV249 | Special (Mul), 4019-A (STC) | 4.0* | 0.25 | Low-impedance triode, 2.5W rating | BC4 | 1 |
POVT72 | Unknown (Mul & STC) | | | Repeater triode | - | - |
| 4020-A (STC) | 2.0* | 0.25 | Amplifier triode | BC4 | 1 |
| 4020-A (STC) | 2.0* | 0.25 | Amplifier triode | BC4 | 1 |
POVT74 = CV1654 | PM2DX (Mul), L2 (Maz) | 2.0* | 0.10 | General-purpose triode | B4 | 1 |
POVT75 = CV1655 | Mullard (Special), 4019-B (STC) | 4.0* | 0.25 | Low-impedance triode, 2.5W rating | B4 | 1 |
POVT75A = CV1655 | 4019-B (STC) | 4.0* | 0.25 | Low-impedance triode, 2.5W rating | B4 | 1 |
POVT76 | Unknown (Mul) | | | Triode, no data available | B4 | - |
POVT77 | P625A (MOV) | 6.0* | 0.25 | Output triode | B4 | 1 |
POVT78 = CV1656 | LS8 (MOV) | 4.0* | 0.15 | Repeater triode | B4 | 1 |
|
POVT79A = CV1657 | 4020-B (STC) | 2.0* | 0.25 | General-purpose triode | B4 | 1 |
POVT80 | Possibly LS9B (MOV)[17] | | Triode, no data available | B4 | 1 | |
POVT80A = CV1658 | LS9B (MOV) | 2.0* | 0.15 | General-purpose triode | B4 | 1 |
| 4022-B (STC) | 4.0* | 0.25 | Detector or AF amplifier triode | B4 | 1 |
POVT82 = CV1660 | LS7 (MOV) | 4.0* | 0.15 | AF triode, 2.6W rating | B4 | 1 |
POVT83 | Unknown (Mul) | | | RF tetrode, metallised | B4+ts | 2 |
POVT84 | Unknown (Maz & MOV) | | | Triode | - | - |
POVT85 = CV1661 | DL (MOV) | 16.0 | 0.25 | Low-power output triode | B5 | 1 |
POVT86 = CV1662 | P215-modified (MOV) | 2.0* | 0.20 | Low-power output triode | B4 | 1 |
POVT87 = CV1663 | 4021-B (STC) | 4.0* | 0.25 | Repeater triode | B4 | 1 |
POVT88 = CV1664 | 4022-AR (STC) | 4.0* | 0.25 | Detector or AF amplifier triode | BC4 | 1 |
POVT89 = CV1665 | DH (MOV) | 16.0 | 0.20 | General-purpose triode | B5 | 1 |
|
POVT90 = CV1732 | ML4 (MOV) | 4.0 | 1.00 | Output triode | B5 | 1 |
POVT91 = CV1038 | MHL4 (MOV) | 4.0 | 1.00 | General-purpose triode | B5 | 1 |
POVT92 = CV1735 | DC2/P (Maz) | 35.0 | 0.10 | Output triode | B5 | 1 |
POVT93 = CV1666 | P610 (MOV) | 5.7* | 0.10 | Output triode | B4 | 1 |
POVT94 = CV1667 | LS5X (MOV) | 6.0* | 0.94 | Output triode, 15W rating | B4 | 1 |
POVT95 = CV1668 | E420 (MOV) | 6.0* | 0.94 | Output triode, 15W rating. Special version of LS5B | B4 | 1 |
POVT96 | Unknown (Maz) | | | | - | - |
POVT97 | Unknown | | | | - | - |
POVT98 = (CV1208) | P625 (MOV), PM256 (Mul) | 6.0* | 0.25 | Output triode | B4 | 1 |
POVT99 | Unknown (MOV) | | | | - | - |
| HL1320 (Maz) | 13.0 | 0.20 | General-purpose triode | B7+tc | 23 |
POVT100B = CV1670 | 4D1 (Bri), HL13C (Mul) | 13.0 | 0.20 | General-purpose triode | B7+tc | 23 |
|
POVT102 = CV1671 | 4021-A (STC) | 4.0* | 0.20 | Repeater triode, 5W rating | BC4 | 1 |
POVT103 | Unknown (probably Pen36C) | 33.0 | 0.20 | Output pentode | B7 | 25 |
| Pen36C (Mul) | 35.0 | 0.20 | Output pentode, 5W rating | B7 | 25 |
POVT104 = CV1040 | PP5/400 (Maz), PX25 (MOV), DO24 (Mul) | 4.0* | 2.00 | Output triode, 25W rating | B4 | 1 |
| HL2 (Maz, MOV) | 2.0* | 0.10 | General-purpose triode | B4 | 1 |
| MS/Pen modified (Cos) AC/S2Pen (Maz) | 4.0 | 1.00 | RF pentode | B7+tc | 5 |
| N43 (MOV) | 4.0 | 2.00 | Output pentode, 10W rating | B7+tc | 15 |
POVT108 = CV1676 | LS8A (MOV) | 4.0* | 0.15 | Power triode, 5W rating | B4 | 1 |
POVT109 = CV1677 | S4VB (Mul) | 4.0 | 1.10 | RF tetrode | B5+tc | 2 |
POVT110 = CV1678 | MH41 (MOV) | 4.0 | 1.00 | Detector or AF triode | B5 | 1 |
| DA30 (MOV), DO26 (Mul) | 4.0* | 2.00 | Output triode, 30W rating | B4 | 1 |
POVT112 = CV1680 | PM202 (Mul) | 2.0* | 0.20 | Output triode | B4 | 1 |
|
POVT113 = CV1681 | TSP4 (Mul) | 4.0 | 1.40 | RF pentode. Metallised | B7+tc | 6 |
POVT114 = CV1682 | PenA4 modified (Mul) | 4.0 | 2.00 | Output pentode, 9W rating | B7+tc | 15 |
POVT115 = CV1683 | MP/Pen (Cos) AC/Pen (Maz), MKT4 (MOV) | 4.0 | 1.00 | Output triode, 8W rating | B7 | 24 |
POVT116 = CV1684 | APP4C (Tung) | 4.0 | 2.00 | Output pentode, 8W rating | B7 | 25 |
POVT116A = CV1685 | APP4C (Tung) | 4.0 | 2.00 | Output pentode, 8W rating | B7 | 25 |
POVT118A = CV1686 | D418 (Tung) | 4.0* | 0.18 | Single signal diode | B4+tc | 10 |
POVT118B = CV1687 | D418 (Tung) | 4.0* | 0.18 | Single signal diode | B4+tc | 10 |
POVT119 = CV1169 | VMP4G (MOV) | 4.0 | 1.00 | Variable-μ RF pentode | B7+tc | 5 |
POVT120 = CV1688 | 4033-L (STC) | 6.0 | 1.40 | Output triode, 25W rating | B5 | 1 |
POVT121A = CV1288 | DET12 (MWT), TY1-50 (Mul), 4304-CB (STC) | 7.5* | 3.25 | VHF triode, 100MHz, 50W rating | B4+2tc | 16 |
| MS/Pen (Cos), 4065-A (STC) | 4.0* | 1.00 | RF pentode (5-pin version) | B5+tc | 2 |
POVT123 = (CV1448) | 4043-C (STC) | 7.5* | 1.20 | RF power triode, 2MHz, 35W | USM4 | 1 |
|
POVT124 = (CV1678) | HLA2 (Bri), MH41 (MOV) | 4.0 | 1.00 | Detector or AF triode | B5 | 1 |
POVT125 = CV1689 | PA1 (Bri), 3B/100B (STC)) | 4.0 | 1.00 | Output triode, 10W rating | B5 | 1 |
POVT126 = CV1690 | 9A1 (Bri) | 4.0 | 1.00 | RF pentode | B5+tc | 2 |
POVT127 = CV1170 | V914 (Maz), D41 (MOV) | 4.0 | 0.30 | Double diode | B5 | 3 |
| DDL4 (Cos) | 4.0 | 0.75 | Double diode | B5 | 3 |
POVT128 = CV1692 | AC/P (Maz) | 4.0 | 1.00 | Output triode | B5 | 1 |
POVT130 = CV1621 | ESW501 (Maz) | 6.0* | 4.00 | Transmitting triode, 50W rating | B4+2tc | 16 |
POVT131 = CV1168 | PX4 (MOV) | 4.0* | 1.00 | Output triode, 15W rating | B4 | 1 |
POVT132 = CV1694 | 4104-D (STC) | 4.5* | 1.00 | Repeater triode, 5W rating | BC4 | 1 |
POVT133 = CV1695 | DDL13 (Cos) | 13.0 | 0.20 | Double diode | B5 | 3 |
POVT136 = CV1118 | PT2 (Fer), KT2 (MOV) | 2.0* | 0.20 | Output pentode or beam tetrode | B5 | 6 |
POVT137 = CV1081 | 4052-A (STC) | 7.5* | 3.00 | Transmitting pentode, 75MHz, 35W rating | USM5+tc Ceramic | 8 |
|
POVT138 = CV1623 | RG1-125 (Mul) | 2.0* | 4.50 | Mercury-vapour half-wave rectifier, 4kV PIV | ESM+tc | - |
POVT139 = CV1037 | AC/HL (Maz), MH4 (MOV), AC/HL (Hivac) | 4.0 | 1.00 | Detector triode | B5 | 1 |
POVT140 = CV1166 | LP2 (MOV) | 2.0* | 0.20 | Output triode | B4 | 1 |
| R3 (Bri), 44IU (Cos), UU5 (Maz), IW4 & MU12/14 (Mul) | 4.0 | 2.50 | Full-wave rectifier, 500V | B4 | 14 |
POVT143 = CV1696 | B21 (MOV) | 2.0* | 0.20 | Class B double triode | B7 | 10 |
POVT144 = CV1371 | PZ1-75 (Mul), SW75-Pen (Edi) | 10.0* | 2.00 | Transmitting pentode, 22MHz, 75W rating | T4+tc | 2 |
POVT145 = CV243 | 4045-A (STC) | 5.0* | 1.60 | RF tetrode | B5 | 6 |
POVT146 = CV1625 | RG3-250 (Mul) | 2.5* | 5.00 | Mercury-vapour half-wave rectifier, 10kV PIV | ESM+tc | - |
POVT147 = CV1697 | X41 (MOV) | 4.0 | 1.15 | Triode hexode frequency changer. Metallised | B7+tc | 3 |
| A819 (MOV) | 3.33 | 1.40 | RF beam tetrode | B7+tc | 30 |
POVT149 = CV1343 | A1065 (MOV), KTZ73 modified (MOV) | 4.0 | 0.25 | RF pentode (4V heater and suppressor grid) | IO+tc | 8 |
POVT150 = CV1699 | SP41 (Maz) | 4.0 | 0.95 | RF pentode. Metallised | MO+tc | 11 |
|
POVT150A = CV1700 | SP41 (Maz) | 4.0 | 0.95 | RF pentode. Metallised | MO+tc | 11 |
POVT151 = CV1701 | XLO (Hivac) | 2.0* | 85mA | Midget triode | Sm4 | 1 |
POVT152 = CV1702 | XP (Hivac) | 2.0* | 83mA | Midget triode | Sm4 | 1 |
POVT153 = CV1703 | XW (Hivac) | 2.0* | 70mA | Midget RF pentode | SM5+tc | 2 |
| L63 (MOV) | 6.3 | 0.30 | AF triode | IO | 20 |
POVT155 = CV1704 | 57 (US) | 2.5 | 1.00 | RF pentode | USM6+tc | 2 |
POVT156 = CV1705 | 58 (US) | 2.5 | 1.00 | Pentode | USM6+tc | 2 |
POVT157 = CV1706 | 2B7 (US) | 2.5 | 0.80 | Double diode pentode | USM7+tc | 2 |
POVT158 = CV1707 | 2A5 (US) | 2.5 | 1.80 | Output pentode, 8.5W rating | USM6 | 8 |
POVT159 = CV1708 | 80 (US) | 5.0* | 2.00 | Full-wave rectifier, 400V | USM4 | 3 |
POVT160 = CV1709 | 6D6 (US) | 6.3 | 0.30 | Variable-μ RF pentode | USM6+tc | 2 |
POVT161 = CV1710 | 6C6 (US) | 6.3 | 0.30 | RF pentode | USM6+tc | 2 |
|
POVT162 = CV1711 | 6B7 (US) | 6.3 | 0.30 | Double diode pentode | USM7+tc | 2 |
POVT163 = CV1712 | 42 (US) | 6.3 | 0.70 | Output pentode, 8.5W rating | USM6 | 8 |
POVT164 = CV1713 | EF8 (Mul) | 6.3 | 0.20 | RF pentode with additional aligned-grid. Metallised | Ct8+tc | 11 |
POVT165 = CV1714 | EF9 (Mul) | 6.3 | 0.20 | Variable-μ RF pentode. Metallised | Ct8+tc | 15 |
POVT166 = CV1715 | EBC3 (Mul) | 6.3 | 0.20 | Double diode triode. Metallised | Ct8+tc | 7 |
POVT167 = CV1716 | E1541 (MOV) | 4.0* | 1.00 | Output triode, 15W rating | B4 | 1 |
POVT168 = CV1626 | RG1-240 (Mul) | 2.0* | 2.70 | Mercury-vapour half-wave rectifier, 4.7kV p.i.v. | B4+tc | 6 |
POVT169 = CV1717 | 4307-A (STC) | 5.5* | 1.00 | RF pentode, 15W rating | USM5+tc | 8 |
POVT170 = CV1718 | AC/TP (Maz) | 4.0 | 1.25 | Triode pentode frequency changer. Metallised | B9+tc | 2 |
POVT171 = CV1719 | U22 (Maz) | 2.0 | 2.00 | EHT Half-wave rectifier, 4.5kV | MO+tc | 17 |
POVT177 = CV1720 | XL1.5 (Hivac) | 1.5* | 83mA | Midget output triode | Sm4 | 1 |
POVT178 = CV1721 | XP1.5 (Hivac) | 1.5* | 0.083 | Midget output triode | Sm4 | 1 |
|
| A901 (MOV) | 5.5 | 1.40 | Output tetrode, 10W rating | B7 | 24 |
| EF39 (Mul) | 6.3 | 0.20 | Variable-μ RF pentode. Metallised | IO+tc | 8 |
| EL32 (Mul) | 6.3 | 0.20 | Output pentode, 7.5W rating | IO+tc | 9 |
POVT182 = CV1723 | V257 (Maz) | 2.0* | 0.15 | RF pentode. Metallised | MO+tc | 1 |
| 5A/102D (STC) | 7.5 | 0.85 | Output pentode, 9W rating | IO+tc | 8 |
POVT185 = CV245 | 4328-D (STC) | 7.5 | 0.425 | RF pentode | IO+tc | 8 |
POVT186 = CV1726 | 5A/105A (STC) | 4.0 | 0.425 | RF pentode | IO | 157 |
POVT187 = CV1627 | 5D/100A (STC) | 10.0* | 16.00 | Transmitting pentode, 10MHz, 1kW rating | Special | - |
POVT188 = CV1727 | SP210 (Maz) | 2.0** | 0.10 | RF pentode | B7+tc | 4 |
POVT189 = CV1128 | GT1C (MOV) | 4.0 | 1.35 | Argon-filled thyratron. | B5 | 1 |
POVT190 = CV1728 | WE262B (W-E) | 10.0 | 0.32 | Repeater triode | USM4+tc | 23 |
POVT191 = CV1628 | GU8 (MWT) | 2.35* | 40.00 | Mercury-vapour half-wave rectifier, 22kV PIV | Special | - |
|
| KTW62 (MOV) | 6.3 | 0.30 | Variable-mu RF beam tetrode | IO+tc | 9 |
POVT194 = CV587 | 6Q7G (US), DH63 (MOV) | 6.3 | 0.30 | Double diode triode | IO+tc | 29 |
POVT195 = CV1863 | 5Z4G (US) | 5.0 | 2.00 | Full-wave rectifier, 350V | IO | 62 |
| 6V6G (US) | 6.3 | 0.45 | Output beam tetrode, 13.2W rating | IO | 36 |
POVT197 = CV1629 | RG3-1250 (Mul), GU21 (MWT) | 4.0* | 7.00 | Mercury-vapour half-wave rectifier, 11kV PIV | ESG+tc | - |
| KT66 (MOV) | 6.3 | 1.27 | Output beam tetrode, 25W rating | IO | 36 |
| 807 (US) | 6.3 | 0.90 | RF power tetrode, 25W rating | USM5+tc | 6 |
| SP41 (Maz) modified | 6.3 | 0.63 | RF pentode (6.3Vheater). Metallised | MO+tc | 11 |
| EF36 (Mul) | 6.3 | 0.20 | RF pentode. Metallised | IO+tc | 8 |
| EB34 (Mul) | 6.3 | 0.20 | Double diode. Metallised | IO | 53 |
POVT203 = CV9 | AL60 (Mul) | 4.0 | 2.10 | Output pentode | B7+tc | 5 |
POVT204 = CV18 | DET19 (MWT), 4074-A (STC), RK34 (Ray) | 6.3 | 0.80 | RF double triode, 5W rating | USM7+2tc | 12 |
|
POVT205 = CV1630 | 5C/450A (STC) | 10.0* | 13.00 | Transmitting pentode, 10MHz, 450W rating | Special | - |
| SU2150A (Cos) | 2.0 | 1.50 | Half-wave rectifier, 5kV p.i.v. | B4+tc | 6 |
| EF50 (Mul) | 6.3 | 0.30 | RF pentode. Enclosed in metal shell | B9G | 1 |
† Filament voltage 'as marked'. Data has not been found for several of the valves, particularly the early types. These are known to have existed but most probably in quite small quantities.
